<template>
  <el-breadcrumb class="breadcrumb" separator="/">
    <transition-group name="breadcrumb">
    <el-breadcrumb-item
      v-for="(item, index) in breadcrumbData"
      :key="item.path"
    >
      <!-- 不可点击项 -->
      <span v-if="index === breadcrumbData.length - 1" class="no-redirect">{{
        item.meta.title
      }}</span>
      <!-- 可点击项 -->
      <a v-else class="redirect" @click.prevent="onLinkClick(item)">{{
        item.meta.title
        }}</a>
    </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script setup>
  import { ref, watch } from 'vue'
  import { useRoute, useRouter } from 'vue-router'
  import { useStore } from 'vuex'

  const route = useRoute()
  // 生成数组数据
  const breadcrumbData = ref([])
  const getBreadcrumbData = () => {
    breadcrumbData.value = route.matched.filter(
      item => item.meta && item.meta.title
    )
    // console.log(breadcrumbData.value)
  }
  // 监听路由变化时触发
  watch(
    route,
    () => {
      getBreadcrumbData()
    },
    {
      immediate: true
    }
  )

  // 处理点击事件
  const router = useRouter()
  const onLinkClick = item => {
    // console.log(item)
    router.push(item.path)
  }

  // 如果将来需要进行主题替换，所以这里获取下动态样式
  const store = useStore()
  const linkHoverColor = ref(store.getters.cssVar.menuBg)
</script>

<style lang="scss" scoped>
  .breadcrumb {
    display: inline-block;
    font-size: 14px;
    line-height: 50px;
    margin-left: 8px;

    .no-redirect {
      color: #97a8be;
      cursor: text;
    }
    .redirect {
      color: #666;
      font-weight: 600;
    }

    .redirect:hover {
      // 如果将来需要进行主题替换，所以这里不去写死样式
      color: v-bind(linkHoverColor);
      font-weight: 900;
      text-decoration:underline

    }
  }
</style>

